forked from Minki/linux
d37705092f
Several files refer to an old address for the Free Software Foundation in the file header comment. Resolve by replacing the address with the URL <http://www.gnu.org/licenses/> so that we do not have to keep updating the header comments anytime the address changes. CC: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
367 lines
9.7 KiB
C
367 lines
9.7 KiB
C
/*********************************************************************
|
|
*
|
|
* Filename: ircomm_ttp.c
|
|
* Version: 1.0
|
|
* Description: Interface between IrCOMM and IrTTP
|
|
* Status: Stable
|
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
|
* Created at: Sun Jun 6 20:48:27 1999
|
|
* Modified at: Mon Dec 13 11:35:13 1999
|
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
|
*
|
|
* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
|
|
* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
********************************************************************/
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
#include <net/irda/irlmp.h>
|
|
#include <net/irda/iriap.h>
|
|
#include <net/irda/irttp.h>
|
|
|
|
#include <net/irda/ircomm_event.h>
|
|
#include <net/irda/ircomm_ttp.h>
|
|
|
|
static int ircomm_ttp_data_indication(void *instance, void *sap,
|
|
struct sk_buff *skb);
|
|
static void ircomm_ttp_connect_confirm(void *instance, void *sap,
|
|
struct qos_info *qos,
|
|
__u32 max_sdu_size,
|
|
__u8 max_header_size,
|
|
struct sk_buff *skb);
|
|
static void ircomm_ttp_connect_indication(void *instance, void *sap,
|
|
struct qos_info *qos,
|
|
__u32 max_sdu_size,
|
|
__u8 max_header_size,
|
|
struct sk_buff *skb);
|
|
static void ircomm_ttp_flow_indication(void *instance, void *sap,
|
|
LOCAL_FLOW cmd);
|
|
static void ircomm_ttp_disconnect_indication(void *instance, void *sap,
|
|
LM_REASON reason,
|
|
struct sk_buff *skb);
|
|
static int ircomm_ttp_data_request(struct ircomm_cb *self,
|
|
struct sk_buff *skb,
|
|
int clen);
|
|
static int ircomm_ttp_connect_request(struct ircomm_cb *self,
|
|
struct sk_buff *userdata,
|
|
struct ircomm_info *info);
|
|
static int ircomm_ttp_connect_response(struct ircomm_cb *self,
|
|
struct sk_buff *userdata);
|
|
static int ircomm_ttp_disconnect_request(struct ircomm_cb *self,
|
|
struct sk_buff *userdata,
|
|
struct ircomm_info *info);
|
|
|
|
/*
|
|
* Function ircomm_open_tsap (self)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
int ircomm_open_tsap(struct ircomm_cb *self)
|
|
{
|
|
notify_t notify;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
/* Register callbacks */
|
|
irda_notify_init(¬ify);
|
|
notify.data_indication = ircomm_ttp_data_indication;
|
|
notify.connect_confirm = ircomm_ttp_connect_confirm;
|
|
notify.connect_indication = ircomm_ttp_connect_indication;
|
|
notify.flow_indication = ircomm_ttp_flow_indication;
|
|
notify.disconnect_indication = ircomm_ttp_disconnect_indication;
|
|
notify.instance = self;
|
|
strlcpy(notify.name, "IrCOMM", sizeof(notify.name));
|
|
|
|
self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,
|
|
¬ify);
|
|
if (!self->tsap) {
|
|
IRDA_DEBUG(0, "%sfailed to allocate tsap\n", __func__ );
|
|
return -1;
|
|
}
|
|
self->slsap_sel = self->tsap->stsap_sel;
|
|
|
|
/*
|
|
* Initialize the call-table for issuing commands
|
|
*/
|
|
self->issue.data_request = ircomm_ttp_data_request;
|
|
self->issue.connect_request = ircomm_ttp_connect_request;
|
|
self->issue.connect_response = ircomm_ttp_connect_response;
|
|
self->issue.disconnect_request = ircomm_ttp_disconnect_request;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_connect_request (self, userdata)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static int ircomm_ttp_connect_request(struct ircomm_cb *self,
|
|
struct sk_buff *userdata,
|
|
struct ircomm_info *info)
|
|
{
|
|
int ret = 0;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
/* Don't forget to refcount it - should be NULL anyway */
|
|
if(userdata)
|
|
skb_get(userdata);
|
|
|
|
ret = irttp_connect_request(self->tsap, info->dlsap_sel,
|
|
info->saddr, info->daddr, NULL,
|
|
TTP_SAR_DISABLE, userdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_connect_response (self, skb)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static int ircomm_ttp_connect_response(struct ircomm_cb *self,
|
|
struct sk_buff *userdata)
|
|
{
|
|
int ret;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
/* Don't forget to refcount it - should be NULL anyway */
|
|
if(userdata)
|
|
skb_get(userdata);
|
|
|
|
ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, userdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_data_request (self, userdata)
|
|
*
|
|
* Send IrCOMM data to IrTTP layer. Currently we do not try to combine
|
|
* control data with pure data, so they will be sent as separate frames.
|
|
* Should not be a big problem though, since control frames are rare. But
|
|
* some of them are sent after connection establishment, so this can
|
|
* increase the latency a bit.
|
|
*/
|
|
static int ircomm_ttp_data_request(struct ircomm_cb *self,
|
|
struct sk_buff *skb,
|
|
int clen)
|
|
{
|
|
int ret;
|
|
|
|
IRDA_ASSERT(skb != NULL, return -1;);
|
|
|
|
IRDA_DEBUG(2, "%s(), clen=%d\n", __func__ , clen);
|
|
|
|
/*
|
|
* Insert clen field, currently we either send data only, or control
|
|
* only frames, to make things easier and avoid queueing
|
|
*/
|
|
IRDA_ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;);
|
|
|
|
/* Don't forget to refcount it - see ircomm_tty_do_softint() */
|
|
skb_get(skb);
|
|
|
|
skb_push(skb, IRCOMM_HEADER_SIZE);
|
|
|
|
skb->data[0] = clen;
|
|
|
|
ret = irttp_data_request(self->tsap, skb);
|
|
if (ret) {
|
|
IRDA_ERROR("%s(), failed\n", __func__);
|
|
/* irttp_data_request already free the packet */
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_data_indication (instance, sap, skb)
|
|
*
|
|
* Incoming data
|
|
*
|
|
*/
|
|
static int ircomm_ttp_data_indication(void *instance, void *sap,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ircomm_cb *self = (struct ircomm_cb *) instance;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
|
|
IRDA_ASSERT(skb != NULL, return -1;);
|
|
|
|
ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL);
|
|
|
|
/* Drop reference count - see ircomm_tty_data_indication(). */
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ircomm_ttp_connect_confirm(void *instance, void *sap,
|
|
struct qos_info *qos,
|
|
__u32 max_sdu_size,
|
|
__u8 max_header_size,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ircomm_cb *self = (struct ircomm_cb *) instance;
|
|
struct ircomm_info info;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
IRDA_ASSERT(qos != NULL, goto out;);
|
|
|
|
if (max_sdu_size != TTP_SAR_DISABLE) {
|
|
IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n",
|
|
__func__);
|
|
goto out;
|
|
}
|
|
|
|
info.max_data_size = irttp_get_max_seg_size(self->tsap)
|
|
- IRCOMM_HEADER_SIZE;
|
|
info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
|
|
info.qos = qos;
|
|
|
|
ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info);
|
|
|
|
out:
|
|
/* Drop reference count - see ircomm_tty_connect_confirm(). */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size,
|
|
* max_header_size, skb)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static void ircomm_ttp_connect_indication(void *instance, void *sap,
|
|
struct qos_info *qos,
|
|
__u32 max_sdu_size,
|
|
__u8 max_header_size,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ircomm_cb *self = (struct ircomm_cb *)instance;
|
|
struct ircomm_info info;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
IRDA_ASSERT(qos != NULL, goto out;);
|
|
|
|
if (max_sdu_size != TTP_SAR_DISABLE) {
|
|
IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n",
|
|
__func__);
|
|
goto out;
|
|
}
|
|
|
|
info.max_data_size = irttp_get_max_seg_size(self->tsap)
|
|
- IRCOMM_HEADER_SIZE;
|
|
info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
|
|
info.qos = qos;
|
|
|
|
ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info);
|
|
|
|
out:
|
|
/* Drop reference count - see ircomm_tty_connect_indication(). */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_disconnect_request (self, userdata, info)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static int ircomm_ttp_disconnect_request(struct ircomm_cb *self,
|
|
struct sk_buff *userdata,
|
|
struct ircomm_info *info)
|
|
{
|
|
int ret;
|
|
|
|
/* Don't forget to refcount it - should be NULL anyway */
|
|
if(userdata)
|
|
skb_get(userdata);
|
|
|
|
ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static void ircomm_ttp_disconnect_indication(void *instance, void *sap,
|
|
LM_REASON reason,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ircomm_cb *self = (struct ircomm_cb *) instance;
|
|
struct ircomm_info info;
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
|
|
|
|
info.reason = reason;
|
|
|
|
ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info);
|
|
|
|
/* Drop reference count - see ircomm_tty_disconnect_indication(). */
|
|
if(skb)
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
/*
|
|
* Function ircomm_ttp_flow_indication (instance, sap, cmd)
|
|
*
|
|
* Layer below is telling us to start or stop the flow of data
|
|
*
|
|
*/
|
|
static void ircomm_ttp_flow_indication(void *instance, void *sap,
|
|
LOCAL_FLOW cmd)
|
|
{
|
|
struct ircomm_cb *self = (struct ircomm_cb *) instance;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
|
|
|
|
if (self->notify.flow_indication)
|
|
self->notify.flow_indication(self->notify.instance, self, cmd);
|
|
}
|
|
|
|
|